-2.95% is the change from 677 to 657
Calculation steps:
[( 657 - 677 ) ÷ 677] x 100 = -2.95%
Formula
Percentage change = [(657 - 677) / 677] x 100
Subtract the new number by the original number
657 - 677 = -20
-20 ÷ 677 = -0.029542097488921712
-0.029542097488921712 x 100 = -2.95%